Korea has reported the highest suicide rate among OECD members and according to the data from the Korea national statistical office, suicide is the second major cause of death in adolescents and is increasing. Depression, one of the well-known risk factors of suicide in adolescents, can cause maladjustments to school and family life, problems of interpersonal relationship and drug abuse so that work to trigger the suicidal ideation and behavior. In his study, we planned to examine the relationship between suicidal ideation and behavior and several risk factors by using the standardized diagnostic clinical interview, especially an objective suicide evaluating method which has recently developed.